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Web Search

This page only documents OpenAI-style web search behavior that was revalidated against Crazyrouter production on 2026-03-22. The current primary path is:
  • gpt-5.4
  • POST /v1/responses
  • tools: [{ "type": "web_search_preview" }]

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Current conclusion

In today’s production recheck:
  • gpt-5.4 via the Responses API reliably returned web_search_call
  • the older Chat Completions probe using tools: [{ "type": "web_search" }] returned 200, but did not provide a stable, verifiable search trigger signal, so it is not used as the primary documented pattern

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Verified request

cURL
curl https://crazyrouter.com/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "gpt-5.4",
    "input": "Use web search to find one current technology headline published recently.",
    "tools": [
      {
        "type": "web_search_preview"
      }
    ]
  }'
Verified output.type values: 
["web_search_call", "message"]
This shows that the search step and the final answer are returned separately.

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Python example

Python
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://crazyrouter.com/v1"
)

response = client.responses.create(
    model="gpt-5.4",
    input="Use web search to find one current technology headline published recently.",
    tools=[
        {"type": "web_search_preview"}
    ]
)

print(response.output_text)

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How to confirm search actually ran

Inspect response.output directly:
Python
for item in response.output:
    print(item.type)
If you see: 
web_search_call
message
then the model searched first and answered second.
This production recheck also probed the older Chat Completions shape: 
{
  "tools": [
    {
      "type": "web_search"
    }
  ]
}
Result:
  • the request returned 200
  • but no stable, verifiable search trigger marker was observed
So for Crazyrouter docs, OpenAI-style web search should currently be documented through the Responses API first. Related pages: